Shaft packing



June 12, 1928.

G. W. LEIMAN' SHAFT PACKING Filed April 22, 1925 INVENTOR %W7 M 44/15.7% ATTORNEYS Patented- June 12, 1928.

1,673,365 UNITED STATES PATENT OFFICE.

GEORGE W. LEIMAIN', .OF' NEWARK, NEW JERSEY, ASSIGNOR TO LEIMAN BROS.,OE

NEWARK, NEW JERSEY, A COPARTNERSHIP GUSTAVE A. LEIMAN, EDWARD O. LEIMAN,AND JOHN LEI- GEORGE W. LEIMAN, MAN.

QOMPOSED OF WILLIAM H. LEIMAN,

.. ISHAFT" rncizme.

Application filed April '22, 1925. Serial No. 25,008.

his invention relates to an improvement in shaft packing and moreparticularly to packing for rotary shafts of pumps and other machines,the object being to provide .6 a structure which is simple, effectiveand durable.

Another object is to provide a packing for the shafts of rotary pumpshaving a structure capable of contacting with the adjacent cylinder headof the pump and the shaft, thereby forming efiicient, joints topreventoil from being sucked from the oil receptacle through the shaft hearingsto the interior of the cylinder and to prevent the escape of airtherefro a i Another object is to provide a structure, the elements ofwhich will rotate with the shaft and cylinder of the pump.

Another object is to provide certain imimprovements in the form,construction and.

arrangement of th e'parts, whereby the above Jlamed and. other obgectsmay be effectively attained.

A practical embodiment of my 'invention is represented in theaccompanying drawings, in which Fig. 1 represents aside elevation,partly,

in'section, of a rotary pump having my improved shaft packing inposition thereona enlarged scale, of one of the structures whichembodies my invention, and

Fig. 3 represents a vertical section taken in the plane of theline'III'III of Fig. 2,

looking inthe direction of the arrows.

In the drawings I have shown this inven-' tion as applied to a rotarypump and directed largely. to certain improvements in structures shown,describ'ed and claimed in my United States Letters Patent No. 1,493,-045 dated May 6th, 1924 and United States Letters Patent'No. 1,414,028dated April 25th, 1922. t

- The cylinder is denoted by 1 and its heads by 2, 3. The shaft {Lextends eccentrically through the cylinder 1 passing through the heads2, 3 and through suitable bearings in the oil receptacles 5, 6 connectedto or [formed integral with the outer face of the cylinder heads 2, 3respectively. The cylinder is supported'on a base 7 and secured theretoby means of bolts 8, which base may be bolted to the floor orothersuitable support. w I

.shaft hearings 'or end wall 13 of Fig. 2 represents a vertical section,on an A piston 9,-of cylindrical form, is fixed on the shaft 4 andprovided with the usual vibrating wings (not shown).

To prevent the oil from being sucked from the oil receptacles 5, 6through the to the interior of the cyllnder, or to prevent-the escape ofair from within the cylinder, I provide a packing for each of the innerwalls ofthe heads 2, 3 and the shaft journaled in the heads, each" ofwhich structures comprises a cylin-. drical member 10 having avertically flat face 11, an annular chamber 12, the inner which isinclined. The chamber 12 is arranged to receive an elastic packinglet,which is held in position by a ring follower 15 having an inclined face16 oppositely disposed to the end Wall 13 of the chamber 12. t Thisfollower. 15 is yieldingly held in position by a plurality of coilsprings 17, spaced equidistance, one end of each ,of which springs isseated in a recess l8 inthe hub 19 of the piston 9, while the other endrests in a pocket 20 formed in the face of the ring follower.

It-will be understood that while the coil springs 17 urge thefollowerinto the chamber 12 of the cylindrical member lOand into contact withthe elastic packing 14, the vertical face of the cylindrical member 10will also be forced into intimate contact with the inner face of theadjacent cylinder head.

.To provide lubrication for the contacting surfaces of the cylindricalmember 10 and cylinder heads, the member 10 is formed with a beveledrecess 21, which recess serves to collect and feed outwardly between the'tion, I provide a pin 22, one end of which is fast in the .piston' 9,While the other end has a sliding fit in a hole 23 formed in thecylindrical member 10.

Thus it will be seen thatthe cylindrical member 10 is caused to rotatewith the piston 9., allowing lateral movement on the shaft-4, andyieldingly held with its vertical face 11 in intimate contact with theinner face of the cylinder head. l

I am enabled by this structure to maintain a tight joint between theshaft and the cylinder head and, by reason of the elastic packing 14being ieldingly held in the chamber 12 by the ollower l5 and springs 17,to effect a tight joint between the shaft 4: and the cylindrical member10.

It is obvious that various changes may be resorted to in the form,construction and arrangement of the several parts without departing fromthe spirit and scope of my invention; hence, I do not wish to be limitedto the details herein shown and described except as they may bespecifically included in the claims.

\Vhat I claim is:

l. The combination with a pump having a rotary piston, cylinder heads,and a shaft journaled in said heads, of packing devices movable withsaid piston and shaft and arranged to coact with said cylinder heads,each of said devices comprising a cylindrical member having a relativelylarge flat face disposed to contact with the adjacent cylinder head, alongitudinal bore therethrough for the shaft, the junction of said faceand wall of the bore being beveled to form a relatively small openrecess in the face adjacent the shaft for the reception of oil to be fedto the face and cylinder head, and an annular chamber, an elasticpacking in said chamber, a ring follower movable longitudinally on theshaft in the chamber to engage said packing, and springs interposedbetweenthe piston and follower for iolding the packing in the chamberand the vertical face of the cylindrical member in contact with itscylinder head.

2. The combination with a pump having a rotary piston, cylinder heads,and a shaft journaled in said heads, of packing devices movable withsaid piston and shaft and arranged to coact with said cylinder heads,each of said devices comprising a cylindrical member having a relativelylar e flat face disposed to contact with the adjacent cylinder head, alongitudinal-bore therethrough for the shaft, the junction of said faceand wall of the bore being beveled to form a relatively small openrecess in the face ad- 'acent the shaft for the reception of oil to efed to the face and cylinder head, and an annular chamber, an elasticpacking in said chamber, a ring follower movable longitudinally on theshaft in the chamber to engage said: packing, recesses in said piston,springs located in said recesses in position to engage the follower forholding the packing in the chamber and the vertical face of thecylindrical member in contact with its cylinder head, and pins carriedby the piston arranged to engage the cylindrical members for maintainingthe members in fixed relation with respect to the piston and shaft.

In testimon that I claim the foregoing as my invention, I have signed myname this 21st day of April, 1925.

GEORGE W. LEIMAN.

